If the frequency of a sound wave increases, how are its pitch and energy affected?

Which statement is true about common childhood infectious disease? a. children should always be given antibiotics to treat an infectious illness. b. frequency of infectious illnesses usually increases as children grow older. c. having a minor infectious illness weakens a child's immune system. d. infectious illnesses are usually mild and require no medication.

Whats the difference between epinephrine and norepinephrine?

1. alcohol first impairs your a. motor skills b. judgment c. color recognition